23. Set Baud Rate Field in Control Register

#include <stdio.h>
#include <stdint.h>

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
 uint32_t mask = 0xF << 8;             
    reg = reg & ~mask;                         
    uint32_t new_field = ((uint32_t)(baud & 0xF)) << 8;  
    reg = reg | new_field;                   
    return reg;
}

int main() {
    uint32_t reg;
    uint8_t baud;
    scanf("%u %hhu", &reg, &baud);
    printf("%u", set_baud_rate(reg, baud));
    return 0;
}